In addition to the information in the Corporate members page, we learned on our visit that the bottling plant was only opened in 1938, so all the bottle labels date from then. It is likely that the first labels had ‘bottled at’ on the label to celebrate the opening of the bottling line. It is also likely that the keg label was earlier.
The first labels featured a trademark in the top half of the inner oval. Later labels featured the 1843 boat.